Total hip replacement arthroplasty supporting jig and its system

A total hip replacement arthroplasty supporting system comprising:

• a total hip replacement arthroplasty supporting equipment and
• a total hip replacement arthroplasty supporting jig,
• wherein said total hip replacement arthroplasty supporting jig comprises:
• legs which allow a jig main body to be fitted to a patient's acetabulum exposed by dislocating a femoral head during surgery using a total hip replacement arthroplasty,
• a first locating unit provided in said jig main body to indicate, using a two-dimensional coordinate, an opposite plane substantially opposed to said patient's acetabulum,
• a second locating unit provided in a jig main body to indicate, using said two-dimensional coordinate, an opposite plane substantially opposed to said patient's acetabulum at a position further distant from said acetabulum than said first locating unit,
• an image-taking means holder provided in a freely slidable manner in said first and second locating units to hold an image-taking means for imaging said patient's acetabulum,
• a drilling means holder provided in a freely slidable manner in said first and second locating units to hold a medical drilling means for drilling said patient's acetabulum, and
• wherein said total hip replacement arthroplasty supporting equipment comprises:
• a storage means which stores a postoperative acetabular image data created by preliminarily converting a postoperative ideal patient's acetabular form into a three-dimensional image before surgery using said total hip replacement arthroplasty,
• an image obtaining means which obtains actual image data of said patient's acetabulum imaged by said image-taking means,
• an acetabular three-dimensional actual image data creating means which converts said actual image data into three-dimensional image data to create acetabular three-dimensional actual image data associated with each of two-dimensional coordinates in said first and second locating units, and
• a calculating means which makes said acetabular three-dimensional actual image data and said postoperative acetabular image data retrieved from said storage mean coincide with each other to specify a given position of said ideal acetabular form in said postoperative acetabular image data using each of said two-dimensional coordinates in said first and second locating units.